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tools: turn v -watch into a v watch sub-command, so that it can have its own options

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This commit is contained in:
Delyan Angelov
2021-04-28 12:23:23 +03:00
parent e4a2d1b239
commit 626517f5f7
4 changed files with 51 additions and 18 deletions
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40
cmd/tools/vwatch.v
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@ -3,6 +3,7 @@ module main
import os
import time
import term
import flag
const scan_timeout_s = 5 * 60
@ -37,7 +38,7 @@ const max_scan_cycles = scan_timeout_s * scan_frequency_hz
// workers, thus it does not leak much.
//
// b) A worker process, doing the actual monitoring/polling.
// NB: *workers are started with the -vwatchworker option*
// NB: *workers are started with the --vwatchworker option*
//
// Worker processes will run for a limited number of iterations, then
// they will do exit(255), and then the parent will start a new worker.
@ -259,15 +260,38 @@ fn main() {
mut context := unsafe { &Context(voidptr(&ccontext)) }
context.pid = os.getpid()
context.vexe = os.getenv('VEXE')
context.is_worker = os.args.contains('-vwatchworker')
context.clear_terminal = os.getenv('VWATCH_CLEAR_TERMINAL') != ''
context.add_files = os.getenv('VWATCH_ADD_FILES').split(',')
context.ignore_exts = os.getenv('VWATCH_IGNORE_EXTENSIONS').split(',')
context.opts = os.args[1..].filter(it != '-vwatchworker')
mut fp := flag.new_flag_parser(os.args[1..])
fp.application('v watch')
if os.args[1] == 'watch' {
fp.skip_executable()
}
fp.version('0.0.2')
fp.description('Collect all .v files needed for a compilation, then re-run the compilation when any of the source changes.')
fp.arguments_description('[--clear] [--ignore .db] [--add /path/to/a/file.v] [run] program.v')
fp.allow_unknown_args()
fp.limit_free_args_to_at_least(1)
context.is_worker = fp.bool('vwatchworker', 0, false, 'Internal flag. Used to distinguish vwatch manager and worker processes.')
context.clear_terminal = fp.bool('clear', `c`, false, 'Clears the terminal before each re-run.')
context.add_files = fp.string('add', `a`, '', 'Add more files to be watched. Useful with `v watch -add=/tmp/feature.v run cmd/v /tmp/feature.v`, when you want to change *both* the compiler, and the feature.v file.').split(',')
context.ignore_exts = fp.string('ignore', `i`, '', 'Ignore files having these extensions. Useful with `v watch -ignore=.db run server.v`, if your server writes to an sqlite.db file in the same folder.').split(',')
show_help := fp.bool('help', `h`, false, 'Show this help screen.')
if show_help {
println(fp.usage())
exit(0)
}
remaining_options := fp.finalize() or {
eprintln('Error: $err')
exit(1)
}
context.opts = remaining_options
context.elog('>>> context.pid: $context.pid')
context.elog('>>> context.vexe: $context.vexe')
context.elog('>>> context.opts: $context.opts')
context.elog('>>> context.is_worker: $context.is_worker')
context.elog('>>> context.clear_terminal: $context.clear_terminal')
context.elog('>>> context.add_files: $context.add_files')
context.elog('>>> context.ignore_exts: $context.ignore_exts')
if context.is_worker {
context.worker_main()
} else {
@ -277,8 +301,8 @@ fn main() {
fn (mut context Context) manager_main() {
myexecutable := os.executable()
mut worker_opts := ['-vwatchworker']
worker_opts << context.opts
mut worker_opts := ['--vwatchworker']
worker_opts << os.args[2..]
for {
mut worker_process := os.new_process(myexecutable)
worker_process.set_args(worker_opts)